CAT C11 Kenworth/Peterbilt Exhaust Manifold



  • Improved Performance
  • Improved Durability
  • Fuel Cost Savings

Available for CAT ’03-’07 11.1L Kenworth/Peterbilt C11 Engines



Bully Dog’s Big Rig Premium Exhaust manifolds are the fasted flowing exhaust manifolds in the industry.  REALLY!  Designed to provide quicker turbo spool, higher power output, and more fuel economy with the two main goals to maximize airflow and eliminate any and all known or possible failure points in the existing stock parts, the final result will truly blow you away.

Improved Performance

Reduced turbo lag, Lower EGT’s 80-100 F, Increase fuel mileage 0.2-0.3 mpg, 28-32 hp increase.


No leaks, No warping, No cracking. Thicker manifold flanges and exhaust manifold walls. 100% Made In The USA.

Cost Savings

Capitalize on the fuel savings and horsepower gains with our exhaust manifold. Don’t take the chance of being stranded on the road from a failed OEM exhaust manifold.

Available For: CAT ’03-’07 11.1L Kenworth/Peterbilt C11 Engines

Replaces OEM Part 229-3567.

Additional information

Weight 38 lbs
Dimensions 38 × 9 × 9 in
Select Engine

Paccar MX10 '10-'13 12.9L, Paccar MX13 '13-'18 12.9L



Manifold Type


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